widmer



3 Sheets-Sheet 1.

(No Mode'l.)

J. WIDMER.

' LOOM.

Patented June 28, 1887.

ago, I

N. FUERS, Phelo'ufhngrapbar. Washington. Q

4 3 Sheets-Sfieet 2. J. WIDMER.

(No Model.)

LOOM.

o; 365,420. P atnted June 28, 1887 n PETERS. Pmmm m Washington. D. c.

(No Model.) w I s Sheets-Sheet a. J. WIDMER.

' LOOM.

No. 365,420. Patented June 28, 1887. I

'Q Jaw 20 view of the same.

UNITED STATES PATENT OFFICE.

J ACOB WIDMER, OF HARTFORD, CONNECTICUT.

.LOOM.

SPECIFICATION forming part of Letters Patent No. 365,420, dated June 28, 1887.

Application filed May 7, 1884. Serial No. 130,619. (No model.)

To all whom it may concern:

Be it known that I, JACOB WIDMER, of New Hartford, in the county of Litchfield and State of Connecticut, have invented certain new and 5 useful Improvements in Looms; and I do hereby declare that the following is a full, clear, andexact description thereof, whereby a person skilled in the art can make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

Like letters in the figures indicate the same parts.

Figure 1 is a side view of part of a loom in I elevation, those parts being omitted which are not immediately connected with my improvement. Fig. 2 is'a front view of the same, with parts broken away in front of the plane denoted by line w a: of Fig. 1. Fig. 3 is a top Fig. 4 is a plan view of the periphery of the cam-wheels as developed.

Figs. 5 and 6 are diagram views indetail of the top of the lathe-beam, to illustrate the means for moving the shuttle along the shuttle- -race and the operation of the locking mechanlsm.

My invention relates to the class of positivemotion looms; and it consists in the novel construction of parts and their combination, as will-be hereinafter more fully described, and specially as pointed out in the claims made hereto.

7 In the accompanying drawings, the letter a denotes the main frame of a loom made of any desirable material, as iron cast to shape; I), the lathe-beam borne on the swinging frame b, pivoted to the lower part of the frame a and swung to and fro in a vertical plane upon the pivots b by means of the rod 0 and connected o mechanism. This rod 0 is pivotally connected to the back of the lathe-beam at one end, and is supported in the bearing 0, fast to the frame at a point near the back of the frame, and has a curved slot, 01in a widened part, c, about {.5 midway of the rod; and into this slot projects and works a pin on the outer end of the crank d, fast to oneend of the main driving-shaft d, which is held in suitable bearings in the frame, and is driven by means of a belt-passing over the pulley (1*, also fast to the shaft (1. Near the end of this shaft is secured the cogwheel 6 in mesh with the cog-wheel e, which is fast to the rotary shaft f. This shaft f bears near its center and fast to the shaft a cogwheel, 9, in mesh with the cog-wheel y, that is secured to the rotary cam-shaft h, which bears the camwheels h If, having each a pcripheral cam-groove, h" If. These cam-wheels are elliptical in cross-section or contour, in order that during the vibrations of the lathe by the movements of the reciprocating rod 0 the face of the cams will follow the movements of the lathe, and thus keep the pins t Of the levers t t" in the cam-grooves, notwithstanding the vibrations of the levers with the lathe.

To the cross-bar b of thelat-he frame are pivoted upon each side of the center the two levers t i, which move in a plane parallel to the lathe-frame and bear pins 2, that project into and are held in the cam-grooves h h, respectively, as the lathe swings. These levers are ,pivotally connected at their upper ends by means of the connecting-rods k k with the shuttle-slides ZZ, that are reciproeated in a dovetailed groove, 1), in the front of thelathe beam as the levers are swung back and forth by means of the cam-wheels. These slides have each on their outer end an upward-projecting arm, Z Z to which is fastened a shuttlecarrier, mm, so held as to be moved back and forth along the race on the top of the lathebeam. Each slide-arm bears also a latch, am, having a hook, M, on its inner end, and so pivoted as to move in a plane at substantially right angles to the plane of the lathe-frame. Each latch has near its rear end an offset, a, and this part is held outward by means of a spring, 0, arranged as shown in Figs. 5 and 6. -A slide-bar, p, is supported in bearings 0 below the lathe-beam, and is reciprocated b means of the eccentric f, fast to the shaft f, and by means of the connected intermediate mechanism, consisting of eccentrierod f, arm f which is fast to the vertical rock-shaft f supportedin bearings fast to the frame,arn1 f fast to the upper end of the roekshaft, having a slot, f, into which projects a pin, f fast to the rear end of the leverf which is pivoted at its other end to the frame, and bears substantially along its whole length aslot, f, into which projects andmoves a pin, 19*, fast to the slide-bar p. This slide-bar p bears arms p,

which project outward, upward, and then latorally in the plane of movement of the latches, and bear the projecting trip devices qq',which co-operate with the offsets a on the latches in effecting the transfer of the shuttle from one carrier to another.

The shuttle-slides bear the shuttlelocking mechanism and the slide-bar bears the unlocking mechanism of theloom. The withindescribed mechanism is so proportioned and combined that the lathe beats up twice at each revolution of the cam-wheels, each of which bears two cams, by means of which and the connected parts, as described, the shuttle is fed back and forth. This motion of the shuttle in bearing the filling in weaving is performed whilethe lathe is swung back, as shown in Fig. 1, the shuttle being held at either limit ofits play, while the lathe swings forward to beat up the filling.

A spec al advantage of my improvement consists in the manner in which the shuttleis transferred from carriage to carriage without shock, and with a practical continuance of the motion, although not in the carriagein which, it first starts. The method of effecting this is as follows: The shuttle, beginning at the righthand end of the lathe-beam, is moved forward along the race by means of the camgroove h, the cam-wheels turning in the direction of the overlying arrows. At the same time the carrier at is moved forward from the left-hand end of the lathe by means of the camgroove h, the carriers moving toward each other for ati me at about the same rate of speed; but the cam-grooves are so formed in the wheels that the pin projecting from the lever 13' reaches the highest point of the cam-groove hi, and, passing it, starts the carriage m on its backward motion before the carriage on has reached the forward limit of its play. The carriage m now moves faster in its forward motion than the carriage m does in its backward motion, so that the shuttle s is pushed into the carriage m. During this movement of the shuttle and carriage the eccentric and its connected mechanism have moved the slidebar so that the trip q moves forward in the same direction as the carriage m, but at a much less rate of speed, and this movement of the trip q continues until the forward end of the shuttle bears against the face of the opposite earriage, at, when the backward move ment of the trip begins. As the trips q q are rigidly connected to the slide-bar, it follows that their movements are the same in diree' tion and extent, so that as the backward n10- tion of the trip 1 raises the latch n the latch a is released, and its hooked e11d,'eatching into a socket, s, in the side of the shuttle, fastens the latter in the carriage in, which continues its backward motion. This begins, as before described, a short time before the shuttle has been placed in it by the forward motion of the opposite carriage. This opposite carriage, m, is returned to the right-hand end of the lathe, and the shuttle borne by the carriage m to the opposite end of the lathe, thus carrying the filling-thread once through the shed. \Vhile the crank-pin moves from one extremity to the other of the slot 0 in the rod 0, the lathe remains at the backward limit of its play, as seen in Fig. 1; and itis during this dwell that the transfer of the shuttle from one end to the other of the lathe is effected. The rotation of the driving-shaft now forces the rod 0 and the lathe 1) forward and beats up the filling, the pins on the lovers i i being during this time in the part of the grooves in the cam-wheels by which no movement of the levers is produced. Now, as the cam-wheels continue to revolve, the pins of the levers reach the limit of the straight or dead race of the cam-grooves and are directed into the cam-sections of the grooves, and the shuttle-operating levers thus reeiprocated. The form and arrangement of the cam grooves and the dead-race are shown developed in Fi 4. of the drawings, wherein it will be seen that the cam-grooves are arranged opposite to each other in the camwheels, and that the reversing-points of the groove of one cam-wheel are arranged in ad'- vanee of the other, by which arrangement the return movement of one of the shuttle-operating levers begins before the other shuttle-op crating lever has reached its forward limit of stroke, and the shuttle is thus transferred without shock.

As shown in Fig. 4, the cam-grooves are of duplicate construction, but disposed in reverse arrangement on the respective cam-wheels, in order that the lever carrying the shuttle may effect its delivery and transfer, as heretofore described, the movements of the mechanism being identical, except in the respects that the shuttleoperating levers reach their limit of stroke in alternate precedence.

A special advantage results from the abovedescribed method of moving the rod 0 by a crank on the driving-shaft, as the rod, and therefore the lathe, are moved forward against the filliiigtliread with a quicker motion and a gradually-increasing pressure in beating up the filling when the eranlcpin in the rotation of the shaft and crank travels downward along the inner face of the slot 0'', thus obviating the shock which results from the blow when the ordinary crank and connectingrod are used.

I claim as my invention 1. The combination, with the driving shaft (I, mounted on the loom-frame, the shaft f, the shaft 71, said shafts bearing gear-wheels iueshing in operative arrangement, the lathe, and the lathe-reciprocating mechanism d and c, of the cam-wheels hand h, mounted on the shaft 7: and made of elliptical form in cross-section, and provided with cam-grooves h hon opposite faees of the ellipse, the levers i i, pivoted to the cross-bar of the lathe and provided with. pins to set within and traverse the said cam-grooves, the connecting rods k, the shuttle-slides Z Z, and the shuttle-carriers m at, substantially as described.

2. The combination, with the lathe of a lCO loom, the vibrating levers, and the shuttleslides arranged to be reoiprocated by said levers, of the locking devices, consisting ofthe spring-actuated latches n n, with hook n and offsets of, and the unlocking device, consisting of a bar, 1), formed with an arm, 1), having the trip-catches q q, and means for reciprocating said bar, all substantially as described.

3. The combination, with the lathe of a loom and mechanism for vibrating it, of cam wheels formed with cam-grooves in their faces,

one of said cam-grooves being arranged with its reversingpoint in advance of the reversingpoint of the cam-groove in the other camwheel, and'shuttleoperating levers pivoted to the lathe-frame'and having pins arranged in said cam-grooves, whereby the return movement of one of the shuttle-operating levers shall begin before the other shuttle-operating lever has reached its forward limit of the stroke, and the shuttle thus transferred without shock, substantially as described.

JACOB WIDMER.

\Vitnesses:

CHAS. L. BURDETT, H. R. WILLIAMs. 

